/* === Reset & Base === */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #f5f5f5;
    color: #333;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* === Screen Management === */
.screen {
    display: none;
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100vh;
    flex-direction: column;
}
.screen.active {
    display: flex;
}
.hidden { display: none !important; }

/* === Buttons === */
.btn {
    padding: 12px 32px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    min-width: 160px;
}
.btn:hover { transform: scale(1.03); }
.btn:active { transform: scale(0.97); }
.btn-primary {
    background: linear-gradient(135deg, #7c5ce0, #a855f7);
    color: #fff;
    box-shadow: 0 4px 12px rgba(124, 92, 224, 0.3);
}
.btn-primary:hover { box-shadow: 0 6px 16px rgba(124, 92, 224, 0.4); }
.btn-secondary {
    background: #666;
    color: #fff;
}
.btn-danger {
    background: transparent;
    color: #e74c3c;
    border: 1px solid #e74c3c;
    padding: 6px 12px;
    min-width: auto;
    font-size: 13px;
}
.btn-small {
    padding: 8px 20px;
    font-size: 13px;
    min-width: auto;
}
.btn-outline-danger {
    background: transparent;
    color: #e74c3c;
    border: 1px solid #e74c3c;
}
.btn-outline-danger:hover {
    background: rgba(231, 76, 60, 0.1);
}
.btn-large {
    padding: 16px 48px;
    font-size: 20px;
    min-width: 200px;
}
.nav-btn {
    background: transparent;
    border: 1px solid #ccc;
    border-radius: 8px;
    padding: 6px 14px;
    font-size: 14px;
    cursor: pointer;
    color: #555;
    transition: all 0.15s;
}
.nav-btn:hover { border-color: #7c5ce0; color: #7c5ce0; }

/* === Home Screen === */
#screen-home {
    background: linear-gradient(180deg, #fafafa 0%, #f0ecf9 100%);
    align-items: center;
    justify-content: center;
}
.home-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    z-index: 1;
}
.home-title {
    font-size: 72px;
    font-weight: 800;
    color: #444;
    letter-spacing: -2px;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.08);
}
.title-x {
    color: #7c5ce0;
}
.home-subtitle {
    font-size: 18px;
    color: #888;
    margin-bottom: 20px;
}
.home-decor, .game-decor {
    position: absolute;
    font-size: 48px;
    opacity: 0.25;
    user-select: none;
}
.decor-tl { top: 40px; left: 40px; }
.decor-tr { top: 40px; right: 40px; }
.decor-bl { bottom: 40px; left: 40px; }
.decor-br { bottom: 40px; right: 40px; }

/* === Editor Screen === */
#screen-editor {
    background: #2a2a3a;
    color: #eee;
    overflow: hidden;
}
.editor-header {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    background: #222233;
    border-bottom: 1px solid #3a3a4a;
}
.stage-nav {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 18px;
    font-weight: 600;
}
.stage-nav-btn {
    background: transparent;
    border: 1px solid #555;
    border-radius: 8px;
    color: #ccc;
    font-size: 22px;
    width: 36px;
    height: 36px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}
.stage-nav-btn:hover { border-color: #7c5ce0; color: #7c5ce0; }
.stage-actions {
    display: flex;
    gap: 8px;
}
.stage-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    width: 100%;
}

.editor-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    padding: 20px;
    height: calc(100vh - 45px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.grid-section {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.section-label {
    font-size: 14px;
    color: #999;
    margin-bottom: 10px;
}
.source-section {
    text-align: center;
}
.source-list {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}
.source-item {
    width: 90px;
    height: 90px;
    border: 2px dashed #555;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: grab;
    transition: all 0.15s;
    background: #333345;
    gap: 4px;
    position: relative;
    overflow: hidden;
}
.source-item:hover {
    border-color: #7c5ce0;
    transform: scale(1.05);
}
.source-item .action-icon {
    font-size: 36px;
    line-height: 1;
}
.source-item .action-name {
    font-size: 12px;
    color: #aaa;
}

/* === Beat Grid (shared editor & game) === */
.beat-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.beat-row {
    display: flex;
    gap: 12px;
}
.beat-box {
    width: 100px;
    height: 100px;
    border: 2px solid #ddd;
    border-radius: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #fff;
    transition: all 0.12s ease;
    position: relative;
    overflow: hidden;
    gap: 2px;
}
.beat-box .action-icon {
    font-size: 40px;
    line-height: 1;
}
.beat-box .action-name {
    font-size: 13px;
    font-weight: 600;
    color: #555;
}

/* Editor grid styling */
.beat-placeholder {
    font-size: 12px;
    color: #666;
    pointer-events: none;
}
#screen-editor .beat-box {
    background: #3a3a4e;
    border-color: #555;
    cursor: pointer;
}
#screen-editor .beat-box .action-name {
    color: #ccc;
}
#screen-editor .beat-box.drag-over {
    border-color: #7c5ce0;
    background: #4a4a6e;
    transform: scale(1.05);
}
#screen-editor .beat-box.has-action {
    border-style: solid;
}

/* Editor BPM */
.editor-bpm {
    text-align: center;
}
.editor-bpm label {
    font-size: 14px;
    color: #999;
    margin-bottom: 6px;
    display: block;
}
.bpm-row {
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: center;
}
.bpm-row input[type="range"] {
    width: 200px;
    accent-color: #7c5ce0;
}
.bpm-row span {
    font-size: 20px;
    font-weight: 700;
    color: #7c5ce0;
    min-width: 40px;
}
.bpm-demo-btn {
    background: transparent;
    border: 1px solid #666;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    color: #ccc;
    font-size: 11px;
    cursor: pointer;
    margin-left: 6px;
    vertical-align: middle;
    transition: all 0.15s;
    line-height: 1;
}
.bpm-demo-btn:hover { border-color: #7c5ce0; color: #7c5ce0; }
.bpm-demo-btn.playing { border-color: #e74c3c; color: #e74c3c; }
.bpm-seconds {
    display: block;
    font-size: 13px;
    color: #777;
    margin-top: 4px;
}
#btn-detect-bpm {
    margin-top: 8px;
}
#btn-detect-bpm:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
.editor-waveform {
    width: 100%;
    max-width: 400px;
    height: 80px;
    margin-top: 10px;
    border-radius: 8px;
    overflow: hidden;
    background: #1a1a2e;
    border: 1px solid #555;
}
.editor-waveform canvas {
    width: 100%;
    height: 100%;
    display: block;
}
.bpm-music-status {
    display: inline-block;
    font-size: 13px;
    color: #7c5ce0;
    margin-top: 6px;
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: #999;
    margin-top: 8px;
    cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
    accent-color: #7c5ce0;
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* Editor ad */
.editor-ad {
    width: 100%;
    max-width: 600px;
    margin-top: 12px;
}

/* Editor buttons */
.editor-buttons {
    display: flex;
    gap: 12px;
}

/* === Game Screen === */
#screen-game {
    background: linear-gradient(180deg, #fafafa 0%, #f0ecf9 100%);
    align-items: center;
}
.game-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    width: 100%;
    padding: 12px 20px;
    background: rgba(255,255,255,0.9);
    border-bottom: 1px solid #eee;
}
.game-header > :first-child {
    justify-self: start;
}
.game-header > :last-child {
    justify-self: end;
}
.game-stage-info {
    font-size: 36px;
    font-weight: 800;
    color: #555;
    letter-spacing: 4px;
    text-align: center;
}
.game-round-label {
    font-size: clamp(18px, 2.5vmin, 32px);
    font-weight: 800;
    padding: 0.4vmin 2vmin;
    border-radius: 8px;
    text-align: center;
    letter-spacing: 2px;
    margin-bottom: 5vmin;
    display: flex;
    align-items: center;
    justify-content: center;
}
.round-watch {
    background: #e8f0fe;
    color: #4A90D9;
    border: 3px solid #4A90D9;
}
.round-do {
    background: #fef3e8;
    color: #E8913A;
    border: 3px solid #E8913A;
    animation: pulse-do 0.5s ease-in-out infinite alternate;
}
@keyframes pulse-do {
    from { transform: scale(1); }
    to { transform: scale(1.08); }
}
.game-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

/* Game grid - responsive scaling with vmin */
.game-grid .beat-box {
    width: clamp(100px, 18vmin, 260px);
    height: clamp(100px, 18vmin, 260px);
    border: 3px solid #ddd;
    border-radius: clamp(12px, 2vmin, 24px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.game-grid .beat-box .action-icon {
    font-size: clamp(40px, 8vmin, 100px);
}
.game-grid .beat-box .action-name {
    font-size: clamp(14px, 2.5vmin, 30px);
}
.game-grid .beat-row {
    gap: clamp(14px, 3vmin, 36px);
}
.game-grid {
    gap: clamp(14px, 3vmin, 36px);
}

/* Active beat (lit up) */
.beat-box.active {
    border-color: #4A90D9;
    background: #e8f0fe;
    transform: scale(1.08);
    box-shadow: 0 0 24px rgba(74, 144, 217, 0.4);
}

.game-controls {
    padding: 20px;
    z-index: 1;
}
.btn-play-stop {
    background: #666;
}

/* Game complete overlay */
.game-complete {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(255,255,255,0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}
.complete-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}
.complete-content h2 {
    font-size: 48px;
}
.complete-content p {
    font-size: 18px;
    color: #888;
}

/* === Source item wrapper (for delete button) === */
.source-item-wrapper {
    position: relative;
    display: inline-block;
}
.source-del-btn {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: none;
    background: #e74c3c;
    color: #fff;
    font-size: 11px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    z-index: 2;
}
.source-del-btn:hover { background: #c0392b; }
.source-add-btn {
    border-color: #7c5ce0 !important;
    border-style: dashed !important;
    cursor: pointer;
    opacity: 0.7;
}
.source-add-btn:hover { opacity: 1; }
.source-reset-btn {
    border-color: #999 !important;
    border-style: dashed !important;
    cursor: pointer;
    opacity: 0.7;
}
.source-reset-btn:hover { opacity: 1; }

/* === Modal === */
.modal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}
.modal-box {
    background: #2a2a3a;
    border-radius: 16px;
    padding: 28px;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    color: #eee;
}
.modal-box h3 {
    font-size: 20px;
    text-align: center;
}
.modal-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.modal-field label {
    font-size: 13px;
    color: #999;
}
.modal-field input {
    padding: 10px 14px;
    border-radius: 8px;
    border: 2px solid #555;
    background: #1a1a2e;
    color: #eee;
    font-size: 18px;
    outline: none;
}
.modal-field input:focus {
    border-color: #7c5ce0;
}
.modal-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 8px;
}

/* === Action Icon Image === */
.action-icon-img {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
}
.has-image .action-name {
    position: relative;
    z-index: 1;
    color: #fff;
    text-shadow: 0 1px 4px rgba(0,0,0,0.8), 0 0 8px rgba(0,0,0,0.5);
    font-weight: 700;
}
.source-item.has-image .action-name {
    margin-top: auto;
    margin-bottom: 6px;
}
.beat-box.has-image .action-name {
    margin-top: auto;
    margin-bottom: 6px;
}

/* === Icon Type Tabs (modal) === */
.icon-type-tabs {
    display: flex;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid #555;
}
.icon-tab {
    flex: 1;
    padding: 8px 16px;
    border: none;
    background: #1a1a2e;
    color: #999;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.15s;
}
.icon-tab.active {
    background: #7c5ce0;
    color: #fff;
}

/* === Image Upload Area === */
.image-upload-area {
    width: 100%;
    height: 120px;
    border: 2px dashed #555;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: #1a1a2e;
    overflow: hidden;
    transition: border-color 0.15s;
}
.image-upload-area:hover {
    border-color: #7c5ce0;
}
.upload-placeholder {
    color: #777;
    font-size: 14px;
}
.upload-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* === Action colors (applied via data-action) === */
.action-forward .action-icon { color: #4A90D9; }
.action-backward .action-icon { color: #E8913A; }
.action-turn .action-icon { color: #C44A8C; }

/* === Responsive === */
@media (max-width: 600px) {
    .beat-box { width: 70px; height: 70px; }
    .beat-box .action-icon { font-size: 28px; }
    .source-item { width: 70px; height: 70px; }
    .source-item .action-icon { font-size: 28px; }
    .home-title { font-size: 48px; }
    .game-stage-info { font-size: 24px; }
}